9.21

Boltzmann Equation for Entropy:

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Leah Savage 2F
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Joined: Fri Sep 29, 2017 7:06 am

9.21

Postby Leah Savage 2F » Tue Feb 06, 2018 5:13 pm

Nanotechnologists have found ways to create and manipulate structures containing only a few molecules. However, orienting the molecules in speci c ways to assemble such structures can be difficult. Calculate the entropy of a solid nanostructure made of 64 molecules in which the molecules (a) are all aligned in the same direction; (b) lie in any one of four orientations with the same energy.

How do you know the kb for the equation in this problem?

Lisa Tang 1C
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Joined: Fri Sep 29, 2017 7:05 am
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Re: 9.21

Postby Lisa Tang 1C » Tue Feb 06, 2018 5:17 pm

Kb is Boltzmann's constant, so it is 1.381 x 10-23 J/K. It doesn't change from problem to problem. Hope this helps!

Maeve Gallagher 1J
Posts: 56
Joined: Fri Sep 29, 2017 7:07 am

Re: 9.21

Postby Maeve Gallagher 1J » Tue Feb 06, 2018 5:19 pm

In this case kb is Boltzmann's constant, 1.38x10^-23 J/K

Jessica Wakefield 1H
Posts: 58
Joined: Thu Jul 27, 2017 3:00 am

Re: 9.21

Postby Jessica Wakefield 1H » Wed Feb 07, 2018 10:13 pm

Kb is Boltzmann's constant, so it is 1.381 x 10-23 J/K but you can still solve part a even if you didn't know that because Kb is multiplied by ln 1 which is 0 so your answer is 0 regardless


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